Wet Gas Scrubber

If there is no add-on control such as a wet gas scrubber, 9.8 kilograms of (SO + SO,) per 1,000 kilograms of coke burned. This is approximately equal to 500 ppmv. Add-on device reduce (SO + SO,) by at least 90% or no more than 500 ppmv, whichever is less stringent. 

Electrostatic precipitators (ESP) and wet gas scrubbers (WGS) are widely used to remove particulates from the FCC flue gas. Both can recover over 80% of filtrable solids. An ESP (Figure 10-6) is typically installed downstream of the flue gas heat recovery (prior to atmospheric discharge) to minimize particulate concentration. If both low particulate and low SO requirements are to be met, a wet gas scrubber such as Belco s (Figure 10-7) should be considered. If SO removal... 

Several technology solutions have been developed to reduce FCCU SOx emissions including catalyst additives, wet gas scrubbers, and regenerative scrubbers. Table 16.1 summarizes various options to reduce SOx emissions. 

There are several different wet gas scrubber designs that have been applied to FCCUs. All are unique in design and application. The following is a summary of licensors with FCC applications ... 

Several refiners have recently dismantled older ESPs and built wet gas scrubbers with wet ESPs to remove SO3 at the stack. In these applications, the SCR unit can be designed to handle the catalyst fines as well as full range equilibrium catalyst during an upset condition. 

Third stage separator (TSS) Electrostatic precipitator (ESP) Wet gas scrubber (WGS)... 

The ESP can also be used to collect catalyst fines prior to a Wet Gas Scrubber (WGS). This eliminates the need for the high pressure drop across the WGS required to achieve low particulate emissions and reduces the need for solids removal from the WGS blow down (Figure 18.9). In installations with an SCR (Selective... 

The Portable Unit was designed to demonstrate the performance of the Shirco Infrared Incinerator in many thermal treatment applications. The construction details and process functions of the trailer-mounted incinerator are identical to a full-scale infrared incinerator. The system consists of a feed preparation system, an infrared primary chamber, a gas-fired secondary chamber, a wet gas scrubber, an exhaust system, heating element power centers (HEPC), and data acquisition and control systems. All equipment is enclosed within a 45-foot trailer. A schematic representation of the Portable Unit is shown in Figure 1. 

Water resource quality/ effluents BOD. suspended solids, salts, toxic metals, sulfates BOD, suspended solids, oil, metals, acids, phenol, sulfides, sulfates, ammonia, cyanides, effluents from wet gas scrubbers Organic chemicals, heavy metals, suspended solids, COD, cyanide Contamination of water by toxic chemicals, accidental spillage of toxic materia] Used effluent... 

The DynaWave Wet Gas Scrubber is an efficient gas scrubbing system designed by Monsanto Envirochem Systems and may be considered by the purchaser. 

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